Measurement of the <tex>$B_{c}^{+}$</tex> meson lifetime using the decay mode <tex>$B_{c}^{+}\rightarrow J/\psi e^{+}\nu_{e}$</tex>Measurement of the <tex>$B_{c}^{+}$</tex> meson lifetime using the decay mode <tex>$B_{c}^{+}\rightarrow J/\psi e^{+}\nu_{e}$</tex>

We present a measurement of the Bc+ meson lifetime in the decay mode Bc+→J/ψe+νe using the Collider Detector at Fermilab II detector at the Fermilab Tevatron Collider. From a sample of about 360 pb-1 of pp&#773; collisions at √s=1.96 TeV, we reconstruct J/ψe+ pairs with invariant mass in the kinematically allowed range 4<MJ/ψe<6 GeV/c2. A fit to the decay-length distribution of 238 signal events yields a measured Bc+ meson lifetime of 0.463+0.073/-0.065(stat)±0.036(syst) ps.